telescopecomparison · 2-way
Sky-Watcher Quattro 250P vs TEC APO140FL f/7
Sky-Watcher
Quattro 250P
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
TEC
APO140FL f/7
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
Key differences
+79% aperture
Faster by 3.0 f-stops
Specifications
| Specification | Sky-Watcher Quattro 250P | TEC APO140FL f/7 |
|---|---|---|
| Optics | ||
| Type | newtonian | refractor |
| Optical design | Newtonian astrograph | Apo triplet fluorite |
| Aperture | 250mm | 140mm |
| Focal length | 1000mm | 980mm |
| Native f/ratio | f/4.0 | f/7.0 |
| Image circle | — | — |
| Full-frame support | Yes | No |
| Physical | ||
| Weight | 15.5kg | — |
Advantages of Sky-Watcher Quattro 250P
- 79% more light-gathering aperture
- Faster optics at f/4 vs f/7
Advantages of TEC APO140FL f/7
Closely matched on the compared specs.
Best for — Sky-Watcher Quattro 250P
- Medium-sized galaxies and planetary nebulae
- Fast imaging — short exposures per sub
- Faint-object imaging under dark skies
- Full-frame astro cameras and DSLRs
Best for — TEC APO140FL f/7
- Medium-sized galaxies and planetary nebulae
Sky-Watcher Quattro 250P — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.06° × 1.38°Scale: 0.78"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.35° × 0.90°Scale: 0.78"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.65° × 0.65°Scale: 0.78"/px
TEC APO140FL f/7 — typical FOV & scale
- With Full-frame (36×24mm, 3.76µm)FOV: 2.10° × 1.40°Scale: 0.79"/px
- With APS-C (23.5×15.7mm, 3.76µm)FOV: 1.37° × 0.92°Scale: 0.79"/px
- With IMX533 square (11.3×11.3mm, 3.76µm)FOV: 0.66° × 0.66°Scale: 0.79"/px
Sky-Watcher Quattro 250P — recommended user
Best suited for intermediate imagers building a versatile kit running a permanent observatory setup.
TEC APO140FL f/7 — recommended user
Best suited for intermediate imagers building a versatile kit running a backyard imaging setup.
